Computer getting power but won't turn on

markofkruger

Active Member
Joined
Feb 7, 2018
Messages
55
My tower PC suddenly switched itself off (I wasn't there, so I don't know if it displayed any error messages), and now won't turn on. It's not the display or the screen.

The motherboard doesn't have LEDs, but the GPU LED turns on, so I don't think it's the PSU.

I've visually checked all the component connector cables, and there's nothing obviously wrong or burnt out. I've also tried a different power cable.

Any ideas what I should check next?


My build:
CPU: AMD Ryzen 5 1600
MOBO: MSI B350 PC Mate AM4
RAM: 2x8GB Corsair LPX DDR4 3000
GPU: ASUS RX 570 4GB
PSU: Andyson 600W 80+ Gold Modular
SSD: Kingston 480GB
CPU Cooler: Deepcool Gammaxx 400
Fans 3x Corsair high airflow 120mm

Running Windows 10 64bit
 
Last edited:

Willy Strong

Expert Member
Joined
Aug 4, 2011
Messages
3,372
Reseat all the internals; cables and parts, one by one. While the mains are disconnected.

PSU could be busted and still supply some current for LEDs.

Check all the capacitors, any damage or leaks.

Only power on with bare minimum components, example: just RAM and CPU with screen connected.
 

markofkruger

Active Member
Joined
Feb 7, 2018
Messages
55
Reseat all the internals; cables and parts, one by one. While the mains are disconnected.

PSU could be busted and still supply some current for LEDs.

Check all the capacitors, any damage or leaks.

Only power on with bare minimum components, example: just RAM and CPU with screen connected.
Should I take the GPU out completely, or can I just unplug the power supply?
 

Willy Strong

Expert Member
Joined
Aug 4, 2011
Messages
3,372
Sometimes parts or cables gets dislodged and reseating them could fix that. If possible, then yes.
 

markofkruger

Active Member
Joined
Feb 7, 2018
Messages
55
Sometimes parts or cables gets dislodged and reseating them could fix that. If possible, then yes.
Okay, unplugged everything but the CPU and power button cable, and tried it with one stick of RAM at a time. Nothing.

Capacitors all look normal.
 

WAslayer

Executive Member
Joined
May 13, 2011
Messages
8,105
Disconnect everything other than CPU, CPU cooler, PSU cables to motherboard.. even RAM removed..

Power on now and listen for beeps (assuming motherboard has on board speakers) if mobo and CPU are okay, you should hear beep sequence corresponding to RAM issue.. if you hear no beeps (again assuming onboard speaker) your mobo/CPU/PSU is borked and you are going to have to swap out one at a time to narrow.dowm which..
 

markofkruger

Active Member
Joined
Feb 7, 2018
Messages
55
Disconnect everything other than CPU, CPU cooler, PSU cables to motherboard.. even RAM removed..

Power on now and listen for beeps (assuming motherboard has on board speakers) if mobo and CPU are okay, you should hear beep sequence corresponding to RAM issue.. if you hear no beeps (again assuming onboard speaker) your mobo/CPU/PSU is borked and you are going to have to swap out one at a time to narrow.dowm which..
I don't believe it has on board speakers...

Might be time to take it to the shop rather than spend money on a buzzer/speaker.

Thanks.
 
Last edited:

ponder

Honorary Master
Joined
Jan 22, 2005
Messages
91,062
Okay, unplugged everything but the CPU and power button cable, and tried it with one stick of RAM at a time. Nothing.

Capacitors all look normal.

Remove that as well and jumper the pins with a screwdriver.

PS. also reseat the cpu.
 

Faux_Grey

Well-Known Member
Joined
Nov 10, 2014
Messages
407
As a stupid question
Is the PC actually not turning on?
fans not moving? GPU fans not moving, disks not spinning up? etc.
 
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